Admission to IIT BHU is offered through joint entrance examination advanced to be eligible to appear for JEE advanced you need to be appear for JEE main and once you qualify JEE main you will be able to appear for JEE advanced only those candidates who scored very good marks and got very good rank are able to get IIT BHU.

JEE main is conducted twice a year once in the month of January in other in the month of April, application form for the month of January has been over and application form for the month of April will commence from February 8 onwards therefore you need to register for JEE main and once you qualify you will be notified using online facility and you need to register for the advance.